Question about 1998 Oldsmobile Bravada

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Starts and stalls. security light on steady. - 1998 Oldsmobile Bravada

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  • gshambow Jan 11, 2011

    TBC fuse blown. Thanks for nothing.

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It's when the security light starts flashing that the infamous "chip" in the key becomes a nightmare to many. Gradually the car begins not cranking anymore or if it cranks it would start and die in a second. Randomly it will do this more and more often until it won't start anymore. VATS, PASSkey and Passlock immobilizer systems are killing cars all over North America, they have a short lifespan and are certainly more effective against owners than thieves. Here is how you save your car
1st trick, (if not starting) turn the key forward 2 clicks till right before it would normally start, leave like that for 10 minutes. ( no less ) After 10 minutes, turn key back then forward and your car might start. I did this in my regal for more than a year. If its shuting down while running, im sorry i have no quick fix...

Cheap fix: Bypass the chip in your key. Temporary, but effective. Until the TDM (theft deterrent module) in the dash poops out, then you're kinda screwed. I was told that these types of key security systems have a 7-10 year life span. Sucks for us. This link explains the "Key Issue" pretty well.
----- http://vats.likeabigdog.com/


Never worry again fix: Bypass the whole VATS/Passlock/passkey I or passkey II system entirely. Literally take it out, and throw it away. I just did this in my Regal. Took about an hour. Took longer to find the thing than it did to fix the problem. For a list of cars effected by this problem. See the NEWROCKIES link on the right side of their page......... They sell a unit for 200 bucks to totally bypass this system FOREVER. life time-money back and all that. Finally did this in my car. Well worth the 200 if you've looked into getting this replaced... Anywhere from 600-1000 bucks.
----- http://newrockies.ca?ap_id=judd0081
----- With this fix, you can take that whole Vats, passlock, passkey **** system out of your car all together. Good info on both sites

Posted on Jan 21, 2011

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97 Nissan quest wont start red security light blinking


The Security Indicator Light illuminates to indicate that the security system is either working properly or to let you know that there is a fault in the system.
If the Security Indicator Light is flashing with the key out of the ignition lock and accessory position, this is a normal sign that the alarm and the immobilizer system is active.
While starting the car or key in the "run" position, the security lamp should illuminate briefly then go out. This a "bulb check" and is also normal.
If the Security Indicator Light is on steady with the key in the "run" position, and the vehicle won't start, there could be a fault with the system. In this case, the first thing to try is a different key to see if this starts the vehicle. If it starts, the key is faulty or the system has a problem with that key. If you are still getting a no-start with the light on steady, the system is at fault and will need to be inspected.

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If the security light is on, it can only be one thing. This light indicates a failure in the antitheft system that will eventually lead to your car refusing to start or continue running. Here is a link with alot of info, plus ways to beat this problem.

http://vatspasslockpasskeysecurityhelp.yolasite.com/

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Gm vehicles have been known to have faulty anti theft security systems. One of the symtoms of this is when your vehicle starts for 1-5 seconds and then stalls. A good way to know if this is the problem is when you see a light on the dash that says SECURITY. If you see this light flashing or on solid, this explains the van not starting. This link might help you

http://vatspasslockpasskeysecurityhelp.yolasite.com/


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actually a pretty easy fix. The pass key computer lost its programming. Put the key in and leave it on with the security light flashing. Just turn off all your accessories and make sure battery is pretty good charge. Anyway after you leave the key on for ten minutes the security light will come on steady so turn key off and right back on and start car. If security light still starts blinking and car stalls then do it again. It will usually work the first time but can take a few times to get it right.

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1999 grand am 'security light' stays blinking - cant start car


1. Attempt to start the car, let it stall, but DO NOT turn the key off! Leave it in RUN.
2. Wait 10 minutes or until the Theft System light glows steady instead of blinking.
3. Do not turn the key off, but start it immediately.
4. This should reset your Passlock system.

The other issue is that the BCM harness is known to corrode and will cause the passlock to fail and will lead to a no start. Check the BCM under the glove box, the bcm had somehow get's wet and the terminals corrode. Sand down all the corrosion that you could and put the bcm back into place and the car should started up fine and worked normally if done right. ONLY DO THIS IF YOUR SECURITY LIGHT STAYS SOLID AND DOES NOT RESET FROM THE ABOVE INSTRUCTIONS.

Thank you for using fixya and keep us posted.

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How do you reset the passlock


1. Attempt to start the car, let it stall, but DO NOT turn the key off! Leave it in RUN.
2. Wait 10 minutes or until the Theft Sys light glows steady instead of blinking.
3. Do not turn the key off, but start it immediately.
4. This should reset your Passlock system.

If this doesn't reset the system then there is a "hard fault" and u will need to have the dealer scan the security system for faults.

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My 2007 tahoe security light came on and now my car wont start. Do you have any idea how to unlock the security? I have tried looking in my manual and no clue


It's the passlock system that is acting up.. I have the same problem at the moment but mines came from disconnecting my stereo system, the power wire sparked and toasted one of the computers. now the important thing is if the security light is flashing or is steady on.. if it is flashing you just have ti reset the security by turning the key to the on posistiona and wait about 10 - 15minutes and let the pass lock reset.. is it is steady on (no flashin):

a steady light means that you could have a Class 2 data circuit problem. It indicates that your "passward" from your key in the "passlock" is not getting sent to the (Vehicles Thieft Deterrent) thats inside your Vehicles Control Module. This shuts down your fuel log or injectors stopping the engine from starting. The vehicle might start, but then stalls after 4 sec or so.
It's like the vehicle thinks it's been stollen. That's too bad, if your light was flashing "and" your cycles were correct the car would have re-leaned the passward and started.
A problem could mean...but not limited to a open,shorted or grounded circuit....or a loose or open connector between these comunicating systems: SIP/PCM/VTD/VCM and perhaps the EBCM.
Security Insturment Panal
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VTD - Vehicle Theift Deterrent
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EBCM - E Brake Control Module

you may have to have the dealer check and replace / but instead of passlock system you may have the Passkey 3+ system

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